crypto::anonymous_namespace{SHA256.cpp} Namespace Reference

Functions
void	sha256_transform (uint32_t state[8], const uint8_t data[64])

Variables
constexpr uint32_t	K [64]

Function Documentation

sha256_transform()

void crypto::anonymous_namespace{SHA256.cpp}::sha256_transform	(	uint32_t	state[8],
		const uint8_t	data[64]
	)

Definition at line 43 of file SHA256.cpp.

{
   uint32_t m[SHA256::BLOCK_SIZE];
 
   int i = 0;
   int j = 0;
 
   for (; i < 16; ++i, j += 4)
      m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) |
             (data[j + 3]);
 
   for (; i < 64; ++i)
      m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
 
   uint32_t a = state[0];
   uint32_t b = state[1];
   uint32_t c = state[2];
   uint32_t d = state[3];
   uint32_t e = state[4];
   uint32_t f = state[5];
   uint32_t g = state[6];
   uint32_t h = state[7];
 
   for (i = 0; i < SHA256::BLOCK_SIZE; ++i)
   {
      const uint32_t t1 = h + EP1(e) + CH(e, f, g) + K[i] + m[i];
      const uint32_t t2 = EP0(a) + MAJ(a, b, c);
 
      h = g;
      g = f;
      f = e;
      e = d + t1;
      d = c;
      c = b;
      b = a;
      a = t1 + t2;
   }
 
   state[0] += a;
   state[1] += b;
   state[2] += c;
   state[3] += d;
   state[4] += e;
   state[5] += f;
   state[6] += g;
   state[7] += h;
}

References crypto::SHA256::BLOCK_SIZE, CH, EP0, EP1, K, MAJ, SIG0, and SIG1.

Referenced by crypto::SHA256::Finalize(), and crypto::SHA256::Update().

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Variable Documentation

K

constexpr uint32_t crypto::anonymous_namespace{SHA256.cpp}::K[64]

constexpr

Initial value:

= {
   0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1,
   0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
   0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786,
   0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
   0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147,
   0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
   0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b,
   0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
   0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a,
   0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
   0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
}

Definition at line 19 of file SHA256.cpp.

Referenced by EBUR128::CalcWeightingFilter(), and sha256_transform().